Nonfat, or lowfat 2%, unsweetened, plain Greek yogurt is widely available now, particularly the Fage brand and Chobani. Most store brand Greek yogurts, eg. Publix, Wegmans, Trader Joe's, and Costco are also just milk and the yogurt starters. I buy non-fat dairy to get higher protein for fewer calories, or Higher Satiety Per Calorie. Eating "lots of spinach", an apple and carrots provide the needed fiber for her nutrient dense carbs.

The magic of a High Protein diet is the Satiety, increase the protein first, and fiber, and you will be satisfied with fewer calories. A recent journal post has the foods I eat, hers sound very similar, and both lists, maybe not surprisingly since it was 2021, are very similar to The P:E Diet.

https://forum.lowcarber.org/showpos...3&postcount=316